US4745614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silent discharge type laser device
Assignee: KABUSHIKI AISHA KOMATSU SEISAKUSHO 3-6 AKASAKA 2-CHOME MINATO-KU TOKYO JAPAN A CORP OF JAPAN
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Filing: 1986-08-20
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Granted: 1988-05-17
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Expires: 2006-08-20
Abstract
Abstract A silent discharge type laser device which comprises a detector for detecting the amount of electric charges passed between electrodes and controlling means for controlling an output current or voltage of a power supply so that a charge amount detected by the detector is equal to a target level, thereby keeping the passage charge amount always constant.
Inventors
- 👤 Akira Egawa
- 👤 Hakaru Mizoguchi
- 👤 Kiyonori Matsuno
- 👤 Tatsuya Ariga
- 👤 Ryoichi Nodomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:46
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H01S3/0971; H01S3/09713
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
151 words
A silent discharge type laser device including a pair of discharging electrodes at least one of which is coated with dielectric material, a laser gas medium between said electrodes, a power source for applying an AC voltage between said discharge electrodes to cause silent discharging therebetween, and an optical resonator having a totally-reflective mirror and a semi-transparent mirror which mirrors delimit a discharging space in a relation opposed to each other, wherein said silent discharging is used to promote laser oscillation; said laser device being characterized by: means for setting a target value of electric charge passed between said discharging electrodes; means for detecting the amount of electric charge passed between said discharging electrodes; and means for controlling output of said power source in response to the detected value of said electric charge-amount detecting means to equalize the target value and the detected electric charge-amount thereby establishing a constant laser output.
Claim 2
Dependent Claim
151 words
A silent discharge type laser device including a pair of discharging electrodes at least one of which is coated with dielectric material, a laser gas medium between said electrodes, a power source for applying an AC voltage between said discharge electrodes to cause silent discharging therebetween, and an optical resonator having a totally-reflective mirror and a semi-transparent mirror which mirrors delimit a discharging space in a relation opposed to each other, wherein said silent discharging is used to promote laser oscillation; said laser device being characterized by: means for setting a target value of electric charge passed between said discharging electrodes; means for detecting the amount of electric charge passed between said discharging electrodes; and means for controlling output of said power source in response to the detected value of said electric charge-amount detecting means to equalize the target value and the detected electric charge-amount thereby establishing a constant laser output.
Claim 3
Dependent Claim
30 words
A silent discharge type laser device as set forth in claim 1, wherein said electric charge-amount detecting means detects an integrated sum of a current passed between said discharging electrodes.
Claim 4
Dependent Claim
33 words
A silent discharge type laser device as set forth in claim 2, wherein said electric charge-amount detecting means is a capacitor which accumulates therein electric charges which are passed through said discharging electrodes.
Claim 5
Dependent Claim
56 words
A silent discharge type laser device as set forth in claim 1, wherein said control means includes means for detecting a difference between said target value and the detected value of said electric charge-amount detecting means, and means for changing the output current or the output voltage of said power source until said difference becomes zero.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |